Add Codec2 entry; make Codec2 and Omx optional

Test: make cts -j123 && cts-tradefed run cts-dev -m \
CtsMediaTestCases --compatibility:module-arg \
CtsMediaTestCases:include-annotation:\
android.platform.test.annotations.RequiresDevice

Bug: 112362730
Bug: 121132171
Bug: 128320274
Change-Id: I4ee174bb434935bdf923a30bab40ed3024f45cbe